ING-IND/33 (ELECTRICAL ENERGY SYSTEMS)
DEPARTMENT OF ELECTRICAL,COMPUTER AND BIOMEDICAL ENGINEERING
2nd semester (07/03/2022 - 17/06/2022)
50 lesson hours
Basic knowledge of circuit theory.
The course aims at providing the basic elements of plants and electrical machines in industry and power systems.
Electrical plants: learning the basic techniques for the analysis and design of electrical distribution systems and load centers, with particular reference to the following topics: sizing overhead and cable lines both in medium and low voltage systems; protection circuits against overload and short circuit.
- Medium and low voltage distribution systems; network structure; electric calculation of lines; approximate formulas of voltage drop for short lines; design and verification calculation with the criterion of the maximum admissible voltage drop.
- Thermal phenomena in electrical lines; equations of heat transmission; rated current flow for bare conductors; rated current flow for insulated conductors (electric cables); design of lines according to the thermal criterion; classification and structure of electric cables; cable rated flow for low voltage with air laying or buried installation according to the CEI-UNEL standards; operation of overloaded and short-circuited lines.
- Operating devices; classification and definitions; interruption of current flows; characteristics of circuit breakers, disconnectors and contactors, circuit breakers and differential circuit breakers.
- Protection of low voltage circuits; overcurrent protection; thermal relays; electromagnetic relay; magneto-thermal protection. Fuses. Protection of lines against overloads and short circuits.
Lectures (two thirds) and numerical exercises (one third).
Reccomended or required readings
The lectures of the course and numerous numerical exercises with solutions are made available by the teacher through the Kiro platform.
G. P. Granelli. Dispensing of electrical systems.
G.P. Granelli, M. Montagna. Foundations of Electrical Installations vol. I. Cisalpino - Istituto Editoriale Universitario.
Italian Electrotechnical Committee. CEI 64-8 and CEI-UNEL standards.
Written examination consisting of the numerical and motivated resolution of one or more exercises and answers to some questions.
Sustainable development goals - Agenda 2030